JP4902934B2 - 放送暗号化方法 - Google Patents

放送暗号化方法 Download PDF

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Publication number
JP4902934B2
JP4902934B2 JP2003017887A JP2003017887A JP4902934B2 JP 4902934 B2 JP4902934 B2 JP 4902934B2 JP 2003017887 A JP2003017887 A JP 2003017887A JP 2003017887 A JP2003017887 A JP 2003017887A JP 4902934 B2 JP4902934 B2 JP 4902934B2
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receiver
key
management center
node
subset
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Japanese (ja)
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JP2003273862A (ja
JP2003273862A5 (enExample
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智之 浅野
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Sony Corp
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Sony Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
    • H04L9/0833—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key
    • H04L9/0836—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] involving conference or group key using tree structure or hierarchical structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/601—Broadcast encryption

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
JP2003017887A 2002-01-30 2003-01-27 放送暗号化方法 Expired - Fee Related JP4902934B2 (ja)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US35364002P 2002-01-30 2002-01-30
US60/353640 2002-01-30
US38129902P 2002-05-15 2002-05-15
US60/381299 2002-05-15
US10/292210 2002-11-12
US10/292,210 US7340603B2 (en) 2002-01-30 2002-11-12 Efficient revocation of receivers

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2010005339A Division JP2010081656A (ja) 2002-01-30 2010-01-13 放送暗号化方法、放送復号方法、受信装置、放送暗号化装置及び放送復号装置

Publications (3)

Publication Number Publication Date
JP2003273862A JP2003273862A (ja) 2003-09-26
JP2003273862A5 JP2003273862A5 (enExample) 2006-03-16
JP4902934B2 true JP4902934B2 (ja) 2012-03-21

Family

ID=27617545

Family Applications (2)

Application Number Title Priority Date Filing Date
JP2003017887A Expired - Fee Related JP4902934B2 (ja) 2002-01-30 2003-01-27 放送暗号化方法
JP2010005339A Pending JP2010081656A (ja) 2002-01-30 2010-01-13 放送暗号化方法、放送復号方法、受信装置、放送暗号化装置及び放送復号装置

Family Applications After (1)

Application Number Title Priority Date Filing Date
JP2010005339A Pending JP2010081656A (ja) 2002-01-30 2010-01-13 放送暗号化方法、放送復号方法、受信装置、放送暗号化装置及び放送復号装置

Country Status (2)

Country Link
US (2) US7340603B2 (enExample)
JP (2) JP4902934B2 (enExample)

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Also Published As

Publication number Publication date
US7757082B2 (en) 2010-07-13
JP2010081656A (ja) 2010-04-08
JP2003273862A (ja) 2003-09-26
US20030142826A1 (en) 2003-07-31
US20080152134A1 (en) 2008-06-26
US7340603B2 (en) 2008-03-04

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